Every Tool You Need.
No
Sign-Up. Always Free.
HandleKit provides a collection of sharp, fast, privacy-first utilities for developers and creators. No barriers, just tools.
⭐ Most Popular
Username Checker
Check availability on GitHub, Reddit, Twitter/X, Instagram, TikTok and YouTube simultaneously, results arrive live as they come in.
Password Generator
Generate cryptographically secure random passwords or memorable passphrases. Runs entirely in your browser, nothing is ever sent to a server.
100 Worst Passwords
Is your password on the list hackers check first? See the globally ranked top 100 most common passwords of 2026 and how fast each can be cracked.
All Tools
17 toolsUsername Checker
Check username availability on GitHub, Reddit, Twitter/X, Instagram, TikTok and YouTube instantly.
Image Optimizer
Compress and convert images to WebP, PNG, or JPG directly in your browser.
QR Generator
Create professional, permanent QR codes for URLs and text instantly.
Password Generator
Generate strong, secure, random passwords with custom length and character options.
Word Counter
Count words, characters, sentences and paragraphs. Includes reading time and keyword density.
Text Case Converter
Convert text between UPPERCASE, lowercase, Title Case, camelCase, snake_case, and more instantly.
Color Picker
Pick any color and get its HEX, RGB, HSL and CMYK values. Generate beautiful palettes instantly.
Color Guessing Game
Test your visual memory. Memorize a hue and see how closely you can recreate it using HSL sliders.
URL Encoder / Decoder
Encode and decode URLs and URI components instantly. Essential for developers and API work.
JSON Formatter
Format, validate and minify JSON instantly. Syntax stats, error detection, and one-click copy.
Unit Converter
Convert length, weight, temperature, area, volume, speed and data units instantly and accurately.
Base64 Encoder
Encode text or files to Base64 and decode Base64 strings back to plain text instantly.
Hash Generator
Generate MD5, SHA-1, SHA-256 and SHA-512 hashes from text or any file instantly.
JND Color Test
Scientific color perception benchmark. Find your visual threshold using Delta-E measurements.
Contrast Sensitivity
Measure your ability to detect faint objects using the official Pelli-Robson Log CS benchmark.
GBP Triage Tool
Identify evidence gaps and prepare your Google Business Profile reinstatement appeal before you file.
Barcode Studio
Generate professional 1D barcodes for Code 128, Code 39, UPC, and EAN-13 product labeling.
Frequently Asked Questions
What is HandleKit?
HandleKit is a free collection of browser-based tools for developers, writers, and digital creators. It covers everything from checking username availability across social platforms, to generating secure passwords, converting units, formatting JSON, picking colours, and more, all without needing to create an account or install anything.
Are the tools really free?
Yes, completely and permanently free. There are no premium tiers, no trials, no hidden paywalls. HandleKit is supported by non-intrusive advertising, which keeps everything free for everyone. You'll never be asked for a credit card or email address.
Is my data private?
Privacy is central to how HandleKit is built. Almost all tools—Password Generator, Word Counter, JSON Formatter, URL Encoder, Base64 Encoder, Hash Generator, Color Picker, Text Case Converter, and Unit Converter—run entirely within your browser. Your data never leaves your device. For tools that require a server (Username Checker, Image Optimizer), only the minimum necessary data is sent, and it is not stored. See our Privacy Policy for full details.
Do I need to create an account?
Never. HandleKit requires zero registration. Open any tool, use it, and leave, or bookmark it for next time. There are no accounts, no logins, and no profiles. This is intentional: every account requirement is a barrier to just getting things done.
How is HandleKit different from other tool sites?
Most free tool sites are slow, cluttered, require sign-ups, or gate features behind paywalls. HandleKit is built to be fast, clean, and genuinely useful, with tools that run in the browser rather than sending everything to a server. The design is intentionally premium because we believe good tools should also be a pleasure to use.
Can I suggest a new tool?
Absolutely, we'd love to hear it. Send your idea to contacthandlekit@gmail.com or use the contact page. New tools are added based on what people actually need, so community suggestions are genuinely valued and often built.